Hats off to a gutsy move by a major division of Brunswick. Once again
their annual product brochure frankly addresses a subject that most
builders would rather ignore and more than a few salespeople have
sugar coated over the years: Fuel consumption.

The 2007 versions of the engines used in their medium size cruisers
(36-48 feet) are reported thusly:

Cummins QSB 5.9 375HP configuration: Propshaft HP 364,
WOT 3000, Cruise 2800. GPH at WOT 19.9, GPH at cruise 15.6

Cummins QSB 5.9 420HP configuration: Propshaft HP 407, WOT 3000,
Cruise 2800. GPH at WOT 23.1, GPH at cruise 18.

Cummins QSC8.3 493HP configuration: Propshaft HP 478, WOT 2600,
Cruise 2600. GPH at WOT 26.6, GPH at cruise 20.3

Cummins QSC 8.3 533HP configuration: Propshaft HP 517,
WOT 2600, Cruise 2400. GPH at WOT 29.0, GPH at cruise 22.2

Cummins QSM11 660 HP configuration: Propshat HP 640,
WOT 2300, Cruise 2100. GPH at WOT 33.3, GPH at cruise 23.7

For gasoline engines:

Mercruiser 8.1S Horizon: Propshaft HP 370, WOT 4200-4600, Cruise 3250.
GPH WOT 29.5, GPH at cruise 16.0

Mercruiser 8.1S HO: Propshaft HP 420, WOT 4400-4800, Cruise 3500. GPH
WOT 33, GPH at cruise 18.5

Note: when I posted the version of this same info for either the 2005
or 2006 models several people who don't own any of these engines (and
had no actual technical frame of reference of any sort) all chimed in
to claim I was full of schlitz. Be aware that I am only passing along
some published information and not attempting to claim that I have
personally validated any of it. This information is presented as
possible fodder for discussion, not to facilitate a flame war.